If its utility function is everywhere increasing and concave, rank−dependent expected utility shares a troubling property with expected utility −− aversion to the same moderate−stakes risk at every wealth level implies an extreme aversion to large−stakes risks. In fact, the problem may be even worse for rank−dependent expected utility, since the moderate−stakes risk need not be actuarially fair...

On the evening of 2 November 1988, someone “infected” the Internet with a worm program. That program exploited flaws in utility programs in systems based on BSD-derived versions of UNIX. The flaws allowed the program to break into those machines and copy itself, thus infecting those systems. This program eventually spread to thousands of machines, and disrupted normal activities and Internet co...

Key Performance Indicators are used increasingly by health services, but their relevance and utility may be questionable. In this article, Program Theory is used to model the irreducible stages in the system of clinical care in Child and Adolescent Mental Health Services, define the major program operations in each of these stages, and specify the intermediate outcomes of each stage and the fin...

Effective preventive healthcare services have a significant role in reducing fatality and medical expenses in all human societies and the level of accessibility of customers to these services can be considered as a measure of their efficiency and effectiveness. The main purpose of this paper is to develop a service network design model of preventive healthcare facilities with the principal obje...